Slipstream and DRS

Hello!
Firstly I want to underline that the game is awesome, I'm really having fun, I have been waiting for a game like this on consoles for years.
I have just noticed a couple of things while driving. The first is that I can't feel the slipstream effect while I'm behind a car also at high speed, the second is that I can't feel any difference while using DRS on the Lotus Exos. I don't know if also other players have noticed these things, maybe it's just my impression, but if they're "bugs", I think that fixing this little issues would make the game even better than now.
Thank you very much!

 

Slipstream is very noticeable with most cars, if the straight is long enough. Perhaps you were not close enough or the straight was too short?

 

I thought it was a problem of wing balance set too high for fast tracks, but I drove the Ferrari 599XX (that has only a default value for the wing) at Mugello and Spa, and in the main straights I had difficulties also in staying right behind he other cars, so the only way to overtake was braking after them... For example, you can watch the video of my race (). If you go to 3:42, 7:27 and 9:15 (the last one is the clearest moment), you can see what I said.
However, maybe there are some other things that I haven't considered, or I'm used to games in which the effect is stronger, actually I don't know in a real car how strong the effect is, I only made a comparison with games I played until now.

 

You were not close enough to get the extra tow. In the third moment, you lose the opportunity because your corner exit was not so good. The little kicks on the gas pedal when cornering made you lose exit speed.